Basics Operation of File Handling in C

1. Creation of a new file

(fopen() with attributes as “r” or “r+” or “w” or “w++” or “a” or “a++”)

Mode	Description
R	opens a text file for reading
W	opens a text file for writing
A	opens a text file for appending. (appending means to add text at the end)
r+	opens a text file for reading and writing
w+	opens a text file for both reading and writing. (it first cuts the length of the file to zero if it exists, or create a file if it does not exist)
a+	opens a text file in both reading and writing mode. (It creates a file if it does not exist. Reading will start from the beginning, but writing can only be done at the end)

2. Opening an existing file

( fopen() )

3. Reading from file

( fscanf() or fgetc() )

4. Writing to a file

( fprintf() or fputs() )

5. Moving to a specific location in a file

( fseek() , rewind() )

6. Closing a file

( fclose() )

Basics Functions of File Handling in C

No.	Function	Description
1	fopen()	opens new or existing file
2	fprintf()	write data into the file
3	fscanf()	reads data from the file
4	fputc()	writes a character into the file
5	fgetc()	reads a character from file
6	fclose()	closes the file
7	fseek()	sets the file pointer to given position
8	fputw()	writes an integer to file
9	fgetw()	reads an integer from file
10	ftell()	returns current position
11	rewind()	sets the file pointer to the beginning of the file